Looking for datasheet for Toshiba D455C and D546C391

[Koko]

Hi, I'm looking for datasheets for a Toshiba d455c and D546c391 found on a
20-year old board. Does anyone have any information about these or know
where I should look? Thanks in advance for any help you can give.

 

[Franc Zabkar]

Hi, I'm looking for datasheets for a Toshiba d455c and D546c391 found on a
20-year old board. Does anyone have any information about these or know
where I should look? Thanks in advance for any help you can give.

Try uPD455C (is there one digit missing?) or CD4555??? The second one
could be a uPD546C. Is it a 40-pin CPU or microcontroller? If so, then
I suspect it is ROMed - the 391 suffix would be the firmware ID.

BTW, are you sure these are Toshiba chips and not NEC?

Just in case the first number was a typo:
http://www.ee.washington.edu/stores/DataSheets/cd4000/cd4555.pdf


- Franc Zabkar

 

[Koko]

Franc,
I'm posting on behalf of a friend who doesn't speak English well enough to
have confidence to post. I kind of thought it might be NEC, too. I'll get
back to you soon. Thank you!

 

[Patrick Cheung - townt.com]

HI !

Why not try the following link ?

http://www.toshiba.com/taec/cgi-bin/master_search.cgi

--
Patrick Cheung
Sales Department
Town Target Technology Limited
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